package com.zjy.servlet.user;

import com.zjy.pojo.User;
import com.zjy.service.user.UserService;
import com.zjy.service.user.UserServiceImpl;
import com.zjy.util.Constants;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


public class LoginServlet extends HttpServlet {

    //控制层，调用业务层代码

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("LoginServlet---start...");

        //获取用户名密码
        String userCode = req.getParameter("userCode");
        String userPassword = req.getParameter("userPassword");

        //和数据库中密码对比，调用业务层
        UserService userService = new UserServiceImpl();
        //把登录的人查出来
        User user = userService.login(userCode, userPassword);
        //查有此人,可以登录
        if(user!=null && userPassword.equals(user.getUserPassword())){
            //将用户的信息放到Session中
            req.getSession().setAttribute(Constants.USER_SESSION,user);
            //跳转到主页
            resp.sendRedirect("jsp/frame.jsp");
        }else{//查无此人，转发回登陆页面，顺带提示登陆信息错误
            req.setAttribute("error","用户名或密码不正确");
            req.getRequestDispatcher("login.jsp").forward(req,resp);
        }
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}
